Malicious PDF — malware analysis report

Static analysis result for SHA-256 79692d2cfff28438…

MALICIOUS

PDF

90.6 KB Created: 2021-06-08 14:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0eea1bd861590e01707fae631dd2de58 SHA-1: 1e4ac439175539cf2293af23f75662515076dfd8 SHA-256: 79692d2cfff28438ce1a1fd07460bdfeaed6bef875e754a2a3360d84c29e546d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to distribute phishing or malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://garglob.ru/uplcv?utm_term=estructura+de+lewis+de+tricloruro+de+aluminio PDF link annotation
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/e9acf536b5361598e462f4ea3a1e3c4e/terobipoxomaga.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79a3bf70b---36950172401.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/1a8afe3fbec89b70a722e20cf4c667a2/fadetisurijegobo.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b41600de0---xowelefuvikosexu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6totgrg403gt5majshuh2hclsr/30677080716.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/3d394cad51212668d7c1dfbce86f5c4e/bipuvodobet.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/549ddac3b2cc7e11541eb4114b99ae34/46920376497.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/kezizekuvu.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/c0e6a6a34f567e60be74415be5dd8676/rineguf.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/fozuba.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/6278958306.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609befd292ebe---55971618715.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ild6vagcklbod7mb3pnjj9ol46/48244869236.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/t891j60roed0nsd4d6m2qg4rms/jujobalubazoj.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/91913941201.pdfIn PDF document text
    • http://midel.me/userfiles/file/56562698640.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/mva4pms0r862rr2r9u3fu6utj1/dexemawewerimerekor.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160754017649d1---vebarokululalube.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/h23vg5tbaep50d9uhkdcliuk0r/kubetotu.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/80040695153.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCC 5136 bytes
SHA-256: 9a70a9d708443603cec34730ef90c46264beec788d86f9f1e0252e9f5f80e965
font_01_sfnt_off00013140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13140 13372 bytes
SHA-256: 38ac1288f23c66473a881876a8b703d2914ad59717398e3c2784614e9559a6b2

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